tzcode1998h.tar.gz and tzdata1998i.tar.gz

The files ftp://elsie.nci.nih.gov/pub/tzcode1998h.tar.gz and ftp://elsie.nci.nih.gov/pub/tzdata1998h.tar.gz are now available. These incorporate the changes for Brazil, Chile, and Germany circulated on the time zone mailing list earlier this week; also included is support for use of "24:00" in the input files for the time zone compiler. --ado